使用XAML和WPF，你怎么动画上点击属性，然后逆转连续点击

Question

我想知道是否有只使用XAML对属性进行动画的方式，然后按第二下进行逆动画？

下面是触发我有一个Border对象上，得到滑出的外观的一个示例：

<!-- Animates the Width to Slide It Out. -->
<EventTrigger RoutedEvent="Border.MouseLeftButtonUp">
  <BeginStoryboard>
     <Storyboard>
        <DoubleAnimation Storyboard.TargetName="theFilterControl"
             Storyboard.TargetProperty="Width"
             From="16"
             To="170"
             Duration="0:0:.7" />
      </Storyboard>
    </BeginStoryboard>
 </EventTrigger>

Answer 1

您可以创建一个切换按钮一个控件模板，并把边界在里面。和按钮的控件模板可以给你IsPressed属性为动画。

<ToggleButton>
    <ToggleButton.Template>
        <ControlTemplate  TargetType="{x:Type ToggleButton}">
            <Border x:Name="theFilterControl" Background="#FF686868" 
                BorderBrush="Black" Width="16" />
            <ControlTemplate.Triggers>
                <EventTrigger RoutedEvent="ToggleButton.Checked">
                    <BeginStoryboard> 
                    <Storyboard>
                          <DoubleAnimation Storyboard.TargetName="theFilterControl"
                                 Storyboard.TargetProperty="Width"
                                 From="16"
                                 To="170"
                                 Duration="0:0:.7" />
                    </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
                <EventTrigger RoutedEvent="ToggleButton.Unchecked">
                    <BeginStoryboard>
                        <Storyboard>
                          <DoubleAnimation Storyboard.TargetName="theFilterControl"
                                 Storyboard.TargetProperty="Width"
                                 From="170"
                                 To="16"
                                 Duration="0:0:.7" />
                          </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
    </ToggleButton.Template>
</ToggleButton>

Answer 2

从薏苡的切换按钮想法不错，谢谢！你可以避开的范围问题也通过定义的ControlTemplate外的切换按钮和用户控件（页）内的触发器触发区域，e.g。

  <UserControl.Triggers>
    <EventTrigger RoutedEvent="ToggleButton.Checked"
                  SourceName="ExpandCollapseToggleButton">
        <EventTrigger.Actions>
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation 
                        Storyboard.TargetName="SidebarCanvas"
                        Storyboard.TargetProperty="Width"
                        To="0"
                        Duration="0:0:0.15" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.Actions>
    </EventTrigger>
    <EventTrigger RoutedEvent="ToggleButton.Unchecked"
                  SourceName="ExpandCollapseToggleButton">
        <EventTrigger.Actions>
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation 
                        Storyboard.TargetName="SidebarCanvas"
                        Storyboard.TargetProperty="Width"
                        To="250"
                        Duration="0:0:0.15" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.Actions>
    </EventTrigger>
</UserControl.Triggers>

看来的ControlTemplate的范围是从该用户控件/页完全不同的，所以你不能参考目标这些示波器之间。